Brown the ground beef in a very large skillet or wok with about half the olive oil, breaking it into small pieces. Drain any excess fat, then remove and set aside.
Add the cabbage, mushrooms, and onion to the skillet.
Cook uncovered over medium-high to high heat for 7-10 minutes, stirring occasionally, until the cabbage softens while still keeping some texture and the mushrooms release their moisture.
Add the garlic, black pepper, and crushed red pepper. Cook for 30-60 seconds, stirring constantly.
Return the beef to the skillet.
Add the soy sauce and rice vinegar near the end. Toss thoroughly and serve.
Nutrition
Partial. 0 of 10 ingredients have a resolved food record, so these numbers are a floor, not a total.